Ternary precursor preparation ingredient solution filtering equipment

Abstract

The invention discloses ternary precursor preparation ingredient solution filtering equipment, which comprises a filtering kettle body, a feeding pipe, a discharging pipe, an upper cover, a mesh basket and a filtering bag, and further comprises an inner and outer layer separation structure, the inner and outer layer separation structure comprises an inner guide pipe connected with the feeding pipe, the bottom of the inner guide pipe is connected with a sealing element, the sealing element is locked on the upper edge of the mesh basket, and the inner guide pipe is connected with the discharging pipe; a pressing seat is connected below the upper cover, and the horizontal part of the filter bag is pressed and fixed by the sealing piece and the pressing seat; matching rods are arranged on four outer edges of the filter bag, a connecting buckle is arranged in the center of the bottom of the filter bag, the bag body adjusting structure comprises four inner fixing pieces arranged on the inner side of the mesh basket, a matching plate fixedly connected to the connecting buckle is arranged at the bottom of the mesh basket, and a tensioning piece is arranged on the side, away from the connecting buckle, of the matching plate. According to the invention, the filter bag can be uniformly attached to the metal net basket, so that the pressure at each position is balanced, and the phenomenon of pressure misjudgment is not easy to occur.

Description

Technical Field

[0001] The invention relates to auxiliary equipment for preparing a ternary precursor, in particular to a filter device for preparing a spare batching solution for a ternary precursor. Background Art

[0002] The ternary precursor material is nickel cobalt manganese hydroxide, which is made by stirring a sulfuric acid mixed solution composed of nickel salt, cobalt salt and manganese salt as raw material, and ammonia solution and alkaline solution as auxiliary agents. In the process of preparing the sulfuric acid mixed solution, the liquid raw material in the raw material kettle specified in the batching list is pumped into the required batching kettle through a flow meter, and the required amount of liquid raw material is measured according to the requirements of the batching list. Then the solid raw material is added to the batching kettle and mixed to obtain the required sulfuric acid mixed solution. The obtained sulfuric acid mixed solution can be temporarily stored in a voltage-stabilizing tube after pressure filtration and fine filtration to wait for reaction with ammonia solution and alkaline solution.

[0003] In the existing filtration process of sulfuric acid mixed solution, the sulfuric acid mixed solution is passed into a bag filter press, and the solution that meets the requirements is squeezed out of the filter bag by means of pressurization, and large particles of impurities are retained in the bag body. The pressure is detected at any time during the filtration process, and the filter bag is replaced when the pressure is too high. In the process of replacing the filter bag, the filter bag needs to be evenly spread in the metal frame to ensure the uniformity of pressure. However, due to the uneven level of the installation personnel, the filter bag is prone to wrinkles during the pressurization process after installation, which can easily lead to folding and blockage of multiple discharge positions of the filter bag, resulting in misjudgment of the pressure detection equipment, and frequent opening of the cover for confirmation is required, which greatly delays the filtration progress of the solution.

[0004] Therefore, this case aims to provide a ternary precursor system spare ingredient solution filtering equipment, which can first be divided into two sections for sealing to reduce the explosion phenomenon that may occur when opening the cover to replace the filter bag. At the same time, it can also fine-tune the spreading area of ​​the filter bag after the filter bag is installed, so that the filter bag can be evenly attached to the metal mesh basket, so that the pressure at each position is balanced and it is not easy to misjudge the pressure. Summary of the invention

[0005] The present invention provides a ternary precursor system spare ingredient solution filtering device, which can effectively solve the above problems.

[0006] The present invention is achieved in that:

[0007] A ternary precursor system spare ingredient solution filtering device comprises a filtering kettle body, a feeding pipe connected to a tank body containing a sulfate solution is arranged on one side of the filtering kettle body, a discharge pipe is arranged at the lower end of the right side of the filtering kettle body, an upper cover is movably arranged on the top of the filtering kettle body, a net basket is fixedly connected to the inside of the filtering kettle body, and a filter bag is movably arranged in the net basket, and the solution filtering device also comprises:

[0008] The inner and outer layer separation structure comprises an inner guide tube connected to the feed tube, a seal is connected to the bottom of the inner guide tube, the seal is locked on the upper edge of the mesh basket and forms a first closed space with the mesh basket, a pressure seat is connected to the lower side of the upper cover, when the upper cover is locked on the upper side of the filter kettle body, the pressure seat is fixed on the upper side of the seal, a second closed space is formed between the upper cover, the pressure seat and the seal, and the horizontal part of the filter bag is pressed and fixed by the seal and the pressure seat;

[0009] The bag body adjustment structure comprises matching rods on the four outer edges of the filter bag, a connecting buckle is arranged at the center of the bottom of the filter bag, and the bag body adjustment structure comprises four internal fixing parts arranged on the inner side of the mesh basket. When the filter bag is embedded in the mesh basket, the matching rods slide down along the internal fixing parts, and a matching plate fixed to the connecting buckle is arranged at the bottom of the mesh basket. A tensioning piece is arranged on the side of the matching plate away from the connecting buckle, and the tensioning piece extends and is fixed to the bottom of the inner part of the filter kettle body. When the matching rod of the filter bag is fully matched with the internal fixing part, the tensioning piece drives the matching plate to move downward, so that the matching plate tensions and straightens the filter bag downward.

[0010] As a further improvement, the inner guide tube includes a cross-section connected to the feed pipe, the cross-section is connected to a lower through section through a guide section, a first filter baffle is arranged between the cross-section and the guide section, and a second filter baffle is arranged between the guide section and the lower through section.

[0011] As a further improvement, an external connecting pipe is provided at one end of the guide section away from the first filtering baffle, and the external connecting pipe is extended to the outside of the filtering kettle body and communicated with a suction device.

[0012] As a further improvement, the sealing member comprises a sealing disk locked on the upper edge of the mesh basket by a plurality of rivets, an inner sealing ring is fixedly connected below the sealing disk, and the inner sealing ring is fitted on the upper edge of the mesh basket.

[0013] As a further improvement, the pressure seat includes an outer sealing ring arranged outside the inner sealing ring, two lower sealing rings are arranged below the upper cover, the two lower sealing rings are arranged at intervals, and the feed pipe and the external connecting pipe are arranged in the gap between the lower sealing rings.

[0014] As a further improvement, the internal fixing member includes a limiting seat arranged on the inner edge of the basket, and a long groove flush with the vertical section of the filter bag is formed on the inner side of the limiting seat.

[0015] As a further improvement, the limit seat includes a fixing strip located at the inner edge of the basket, and an elastic pad is provided on both sides of the fixing strip, and the two elastic pads are clamped on the outer peripheral surface of the matching rod.

[0016] As a further improvement, the tensioning member includes a guide ring fixedly connected to the bottom of the outer part of the basket, and the bottom of the matching plate is connected to a telescopic motor, and the telescopic motor is fixedly connected to the bottom of the inner part of the filter kettle.

[0017] The beneficial effects of the present invention are:

[0018] In the existing bag filters for solutions, it is inevitable to replace the filter bags after using them for a period of time. Generally, the filter bags are fixed in position by the pressure introduced. However, if the position of the filter bags is not installed properly, it is easy to cause wrinkles in the filter bags. These wrinkles will not be smoothed out as the pressure of the filter bags is applied. Instead, the filter holes will overlap and cover, thereby increasing the pressure in the kettle body. Therefore, the present invention provides a bag body adjustment structure, firstly, a matching rod and a connecting buckle are added to the conventional filter bag, and at the same time, an internal fixing member and a matching plate are correspondingly provided on the mesh basket, so that the four sides of the filter bag can be fixed after installation, and the bottom of the filter bag is connected to the matching plate. Since the top of the filter bag is fixed, the filter bag guided by the internal fixing member can be moved downward by moving the tensioning member downward, thereby tightening the entire filter bag, smoothing the position where there may be wrinkles, and the entire filter bag is in a relatively flat state, thereby ensuring the pressure stability in the filter chamber and avoiding the phenomenon of misjudgment.

[0019] In the process of matching the internal fixings with the filter bag, a clamping long groove structure is adopted. Through the long groove in the limit seat, the filter bag can be inserted vertically from the top, so that even novices can find the right seat during installation, lowering the threshold of operation.

[0020] When the tensioning piece is tightening the filter bag, it cooperates with the mesh basket through the guide ring and is tightly adsorbed on the connecting buckle of the mesh basket. Then, the entire filter bag is pulled down by the retraction of the telescopic motor. The precision of the pull-down can be controlled by a high-precision telescopic motor to avoid tearing the filter bag.

[0021] During the replacement of the filter bag, the upper cover needs to be opened. However, if the gas in the filter kettle is not exhausted, it is often easy to explode, and the material is easily sprayed everywhere, which is very difficult to clean. Therefore, the present invention sets the original single sealed cavity as a double sealed cavity. First, the introduced gas is directly introduced into the mesh basket through a separate inner guide tube, and is not directly exposed to the upper cover, so that it will not explode directly when the upper cover is opened, and there can be a certain buffer time and space. Since a pressure seat is provided in the upper cover, after the pressure seat is opened, the restricting force in the mesh basket has actually gradually decreased, and it will not explode directly during slow ventilation, thereby avoiding the phenomenon of "blowout" of the filtered particles, and making the air pressure in the equipment more stable.

[0022] In the process of using the inner guide tube for guiding, the inner guide tube is not just a connected pipe. The inside of the inner guide tube is divided into three parts. The first filter baffle and the second filter baffle are respectively set at the connecting positions of the three parts. The filtering accuracy of the first filter baffle and the second filter baffle is weaker than that of the filter bag. Therefore, a baffle can be set at the front end position to perform preliminary filtering on the filtered liquid, reduce the compliance of the filter bag, and reduce the replacement cycle of the filter bag, so as to achieve the guidance to form an independent space while achieving the effect of preliminary filtering of the filtrate.

[0023] In order to avoid the first filter baffle and the second filter baffle from being blocked, an external connecting pipe is set in the middle position between the first filter baffle and the second filter baffle, and back-pumping is performed through the external connecting pipe. The aperture of the first filter baffle is larger than that of the second filter baffle, so the particle layer formed on the second filter baffle is thicker, so the effect of back-pumping through the external connecting pipe is the best.

[0024] The seal and the pressure seat are both used to fix the horizontal part of the filter bag, but the gap between the seal and the pressure seat is not the flat part of the filter bag. The part of the filter bag between the seal and the pressure seat is an arched part, which is not used as a filtering part but as a compensating part. If the tensioning piece is in a stretched state during the downward movement, the filter bag will be damaged if it is pulled hard at this time. Therefore, the arched part provides a certain amount of compensation for the downward pull of the filter bag, thereby ensuring that the filter bag will not be damaged when it is stretched.

[0025] During the sealing process of the seal, it is sealed through two layers. One is through the locking of the sealing disk to achieve hard fixation, and the other is through the fixation of the inner sealing ring and the cooperation with the sealing disk to achieve soft sealing, so that the first enclosed space is closed through the sealing effect of the two layers.

[0026] In the process of sealing through the pressure seat, on the basis of the sealing member, an outer sealing ring is also arranged on the outer side of the inner sealing ring to form two seals with the inner sealing ring. Since the outer sealing ring is also fixed by the inner sealing ring, in order to avoid the poor pressing effect of the sealing disk on the outer sealing ring on the outside, the present invention also arranges a lower sealing ring at the upper end of the outer sealing ring, and the sealing disk is pressed by the lower sealing ring to fix the outer sealing ring, thereby improving the coordination effect between the outer sealing ring and the horizontal part of the filter bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a three-dimensional structural schematic diagram of a ternary precursor system spare ingredient solution filtering device of the present invention.

[0029] Figure 2 It is a top view structural schematic diagram of a ternary precursor system spare ingredient solution filtering device of the present invention.

[0030] Figure 3 The present invention Figure 2 Cross-section view at AA in the middle.

[0031] Figure 4 The present invention Figure 3 Isometric side section view.

[0032] Figure 5 The present invention Figure 3 Magnified view of area B.

[0033] Figure 6 The present invention Figure 3 Magnified view of area C.

[0034] Figure 7 It is a bottom-up three-dimensional structural schematic diagram of the net basket of the present invention.

[0035] Figure 8 It is a top view of the three-dimensional structure of the net basket of the present invention.

[0036] Fig. 9 The present invention Figure 8 Magnified view of area D in the middle.

[0037] Fig.10 It is a schematic structural diagram of the cooperation between the upper cover, the sealing member and the pressure seat of the present invention.

[0038] In the figure:

[0039] Filter kettle body 1, feed pipe 101, discharge pipe 102, upper cover 2, net basket 3, inner and outer layer separation structure 4, inner guide tube 401, cross-sectional section 4011, guide section 4012, lower through section 4013, first filter baffle 4014, second filter baffle 4015, external connecting pipe 4016, seal 402, sealing disk 4021, inner sealing ring 4022, pressure seat 403, outer sealing ring 4031, lower sealing ring 4032, bag body adjustment structure 5, inner fixing part 501, limit seat 5011, fixing strip 50111, elastic pad 50112, matching plate 502, tensioning part 503, guide ring 5031, telescopic motor 5032, matching rod 601. DETAILED DESCRIPTION

[0040] In order to make the embodiments of the present invention, all belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0041] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as referring to the purpose, technical solutions and advantages of the methods. To be more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work indicate or imply relative importance or implicitly indicate the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0042] Reference Figures 1 to 10As shown, a ternary precursor system spare ingredient solution filtering equipment comprises a filtering kettle body 1, a feeding pipe 101 connected to a tank body containing a sulfate solution is arranged on one side of the filtering kettle body 1, a discharging pipe 102 is arranged at the lower end of the right side of the filtering kettle body 1, an upper cover 2 is movably arranged on the top of the filtering kettle body 1, a mesh basket 3 is fixedly connected to the interior of the filtering kettle body 1, and a filter bag is movably arranged in the mesh basket 3, the solution filtering equipment also comprises: an inner and outer layer separation structure 4, comprising an inner guide tube 401 connected to the feeding pipe 101, a sealing member 402 is connected to the bottom of the inner guide tube 401, the sealing member 402 is locked on the upper edge of the mesh basket 3 and forms a first closed space with the mesh basket 3, a pressure seat 403 is connected below the upper cover 2, when the upper cover 2 is locked on the upper side of the filtering kettle body 1, the pressure seat 403 is fixed on the upper side of the sealing member 402, the upper cover 2, A second enclosed space is formed between the pressure seat 403 and the sealing member 402, and the horizontal portion of the filter bag is pressed and fixed by the sealing member 402 and the pressure seat 403; a bag body adjustment structure 5, wherein matching rods 601 are provided on the four outer edges of the filter bag, and a connecting buckle is provided at the center of the bottom of the filter bag. The bag body adjustment structure 5 comprises four internal fixing members 501 provided on the inner side of the mesh basket 3. When the filter bag is embedded in the mesh basket 3, the matching rods 601 slide down along the internal fixing members 501, and a matching plate 502 fixedly connected to the connecting buckle is provided at the bottom of the mesh basket 3. A tensioning member 503 is provided on the side of the matching plate 502 away from the connecting buckle, and the tensioning member 503 extends and is fixed to the bottom of the inside of the filter kettle body 1. When the matching rod 601 of the filter bag is fully matched with the internal fixing member 501, the tensioning member 503 drives the matching plate 502 to move downward, so that the matching plate 502 tensions and straightens the filter bag downward.

[0043] In the existing bag filter of the solution, it is inevitable to replace the filter bag after using it for a period of time. Generally, the filter bag is fixed in position by the pressure introduced. However, if the position of the filter bag is not installed properly, it is easy to cause wrinkles in the filter bag. These wrinkles will not be smoothed out with the pressure of the filter bag, but will cause the filter holes to overlap and cover, thereby increasing the pressure in the kettle. Therefore, the present invention provides a bag adjustment structure 5, firstly, adds a matching rod 601 and a connecting buckle to the conventional filter bag, and at the same time, correspondingly provides an internal fixing member 501 and a matching plate 502 on the basket 3, so that the four sides of the filter bag can be fixed after installation, and the bottom of the filter bag is connected to the matching plate 502. Since the top of the filter bag is fixed, the filter bag guided by the internal fixing member 501 can be moved downward by moving the tensioning member 503 downward, thereby tightening the entire filter bag, so that the position where there may be wrinkles is smoothed, and the entire filter bag is in a relatively flat state, thereby ensuring the pressure stability in the filter chamber and avoiding the phenomenon of misjudgment.

[0044] During the process of the internal fixing part 501 cooperating with the filter bag, the internal fixing part 501 of this embodiment includes a limiting seat 5011 arranged on the inner edge of the net basket 3, and a long groove flush with the vertical section of the filter bag is provided on the inner side of the limiting seat 5011, which adopts a clamping long groove structure, and the filter bag can be vertically inserted from the upper end through the long groove in the limiting seat 5011, so that even a novice can find the right seat during installation, thereby lowering the threshold of operation. In order to improve the adaptability to filter bags of different specifications, the limiting seat 5011 includes a fixing strip 50111 located at the inner edge of the net basket 3, and an elastic pad 50112 is provided on both sides of the fixing strip 50111, and the two elastic pads 50112 are clamped on the outer peripheral surface of the matching rod 601, and the elastic pads 50112 can be selected. Elastic pads 50112 of different specifications are selected and fixed, thereby improving the practicality of the present invention.

[0045] During the process of the tensioning member 503 tightening the filter bag, the tensioning member 503 of the present embodiment includes a guide ring 5031 fixedly connected to the outer bottom of the mesh basket 3, and the bottom of the matching plate 502 is connected to a telescopic motor 5032. The telescopic motor 5032 is fixedly connected to the bottom of the inside of the filter kettle body 1, and is matched with the mesh basket 3 through the guide ring 5031, and is tightly adsorbed on the connecting buckle of the mesh basket 3, and then the entire filter bag is pulled down by the retraction of the telescopic motor 5032. The precision of the pull-down can be controlled by the high-precision telescopic motor 5032 to prevent it from tearing the filter bag. Preferably, the telescopic motor 5032 is a servo motor.

[0046] During the replacement of the filter bag, the upper cover 2 needs to be opened. However, if the gas in the filter kettle body 1 is not exhausted, it is often easy to explode, and the material is easily sprayed everywhere, which is very difficult to clean. Therefore, the present invention sets the original single sealed cavity as a double sealed cavity. First, the introduced gas is directly introduced into the mesh basket 3 through a separate inner guide tube 401, and is not directly exposed to the upper cover 2, so that it will not explode directly when the upper cover 2 is opened, and there can be a certain buffer time and space. Since a pressure seat 403 is provided in the upper cover 2, after the pressure seat 403 is opened, the restricting force in the mesh basket 3 has actually gradually decreased, and it will not explode directly during slow ventilation, thereby avoiding the "blowout" phenomenon of the filtered particles, and making the air pressure in the equipment more stable.

[0047] In the process of using the inner guide tube 401 for guiding, the inner guide tube 401 is not just a connected pipe. The inner guide tube 401 includes a cross-section 4011 connected to the feed pipe 101, and the cross-section 4011 is connected to a lower section 4013 through a guide section 4012. A first filter baffle 4014 is arranged between the cross-section 4011 and the guide section 4012, and a second filter baffle 4015 is arranged between the guide section 4012 and the lower section 4013. The interior of the inner guide tube 401 is divided into three parts, and the first filter baffle 4014 and the second filter baffle 4015 are respectively arranged at the connecting positions of the three parts. The filtering accuracy of the first filter baffle 4014 and the second filter baffle 4015 is weaker than that of the filter bag. Therefore, a baffle can be arranged at the front end to perform preliminary filtering on the filtered liquid, reduce the compliance of the filter bag, and reduce the replacement cycle of the filter bag, so as to achieve the effect of guiding to form an independent space while achieving the effect of preliminary filtering of the filtrate.

[0048] In order to prevent the first filter baffle 4014 and the second filter baffle 4015 from being blocked, an external connecting pipe 4016 is provided at one end of the guide section 4012 away from the first filter baffle 4014. The external connecting pipe 4016 is extended to the outside of the filter kettle body 1 and is communicated with a suction device. In this embodiment, an external connecting pipe 4016 is provided in the middle position of the first filter baffle 4014 and the second filter baffle 4015, and back suction is performed through the external connecting pipe 4016. The aperture of the first filter baffle 4014 is larger than that of the second filter baffle 4015. Therefore, the particle layer formed on the second filter baffle 4015 is thicker, so the effect of back suction through the external connecting pipe 4016 is best.

[0049] The seal 402 and the pressure seat 403 are both used to fix the horizontal part of the filter bag, but the gap between the seal 402 and the pressure seat 403 is not a flat filter bag part. The filter bag part between the seal 402 and the pressure seat 403 is an arched part, which is not used as a filtering part but as a compensating part. If the tensioning member 503 is in a stretched state during the downward movement, the filter bag may be damaged if it is pulled hard at this time. Therefore, a certain amount of compensation is provided for the downward pull of the filter bag through the arched part, thereby ensuring that the filter bag will not be damaged when it is stretched.

[0050] During the sealing process of the seal 402, the seal 402 includes a sealing disk 4021 locked on the upper edge of the mesh basket 3 by a plurality of rivets, and an inner sealing ring 4022 is fixedly connected to the bottom of the sealing disk 4021. The inner sealing ring 4022 is attached to the upper edge of the mesh basket 3, and is sealed by two layers. One is through the locking of the sealing disk 4021 to achieve hard fixation, and the other is through the fixation of the inner sealing ring 4022 and the soft sealing with the sealing disk 4021, so that the first enclosed space is closed through the sealing effect of the two layers.

[0051] In the process of sealing through the pressure seat 403, it is based on the sealing member 402. Specifically, the pressure seat 403 includes an outer sealing ring 4031 arranged on the outside of the inner sealing ring 4022, and two lower sealing rings 4032 are arranged under the upper cover 2. The two lower sealing rings 4032 are arranged at intervals, and the feed pipe 101 and the external connecting pipe 4016 are arranged in the gap between the lower sealing rings 4032. An outer sealing ring 4031 is also arranged on the outside of the inner sealing ring 4022 to form two closures with the inner sealing ring 4022. Since the outer sealing ring 4031 is also fixed by the inner sealing ring 4022, in order to avoid the poor pressing effect of the sealing disk 4021 on the outer outer sealing ring 4031, the present invention further arranges a lower sealing ring 4032 at the upper end of the outer sealing ring 4031, and the sealing disk 4021 is pressed by the lower sealing ring 4032, thereby realizing the fixation of the outer sealing ring 4031, thereby improving the coordination effect between the outer sealing ring 4031 and the horizontal part of the filter bag.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ternary precursor system preparation solution filtering device, comprising a filtering kettle (1), a feeding pipe (101) connected to a tank containing a sulfate solution is arranged on one side of the filtering kettle (1), a discharge pipe (102) is arranged at the lower end of the right side of the filtering kettle (1), an upper cover (2) is movably arranged on the top of the filtering kettle (1), a net basket (3) is fixedly connected to the inside of the filtering kettle (1), and a filter bag is movably arranged in the net basket (3), characterized in that: The solution filtering equipment also includes: The inner and outer layer separation structure (4) comprises an inner guide tube (401) connected to the feed tube (101); the bottom of the inner guide tube (401) is connected to a sealing member (402); the sealing member (402) is locked on the upper edge of the mesh basket (3) and forms a first closed space with the mesh basket (3); a pressure seat (403) is connected below the upper cover (2); when the upper cover (2) is locked on the top of the filter kettle body (1), the pressure seat (403) is fixed on the top of the sealing member (402); a second closed space is formed between the upper cover (2), the pressure seat (403) and the sealing member (402); and the horizontal portion of the filter bag is pressed and fixed by the sealing member (402) and the pressure seat (403); A bag body adjustment structure (5), wherein matching rods (601) are arranged on the four outer edges of the filter bag, and a connecting buckle is arranged at the center of the bottom of the filter bag. The bag body adjustment structure (5) comprises four internal fixing members (501) arranged on the inner side of the net basket (3). When the filter bag is embedded in the net basket (3), the matching rods (601) slide down along the internal fixing members (501). The bottom of the net basket (3) is provided with a matching plate (502) fixed to the connecting buckle. A tensioning member (503) is arranged on the side of the matching plate (502) away from the connecting buckle. The tensioning member (503) extends and is fixed to the bottom of the inside of the filter kettle (1). When the matching rods (601) of the filter bag are fully matched with the internal fixing members (501), the tensioning member (503) drives the matching plate (502) to move downward, so that the matching plate (502) tensions the filter bag downward and straightens it.

2. The ternary precursor system preparation solution filtering device according to claim 1, characterized in that: The inner guide tube (401) comprises a cross-section (4011) connected to the feed tube (101); the cross-section (4011) is connected to a lower through section (4013) via a guide section (4012); a first filter baffle (4014) is arranged between the cross-section (4011) and the guide section (4012); and a second filter baffle (4015) is arranged between the guide section (4012) and the lower through section (4013).

3. The ternary precursor system preparation solution filtering device according to claim 2, characterized in that: An external connecting pipe (4016) is provided at one end of the guide section (4012) away from the first filtering baffle (4014), and the external connecting pipe (4016) is extended to the outside of the filtering kettle body (1) and communicated with a suction device.

4. The ternary precursor system preparation solution filtering device according to claim 1, characterized in that: The sealing member (402) comprises a sealing disk (4021) which is locked on the upper edge of the mesh basket (3) by a plurality of rivets, an inner sealing ring (4022) is fixedly connected below the sealing disk (4021), and the inner sealing ring (4022) is fitted on the upper edge of the mesh basket (3).

5. The ternary precursor system preparation solution filtering device according to claim 1, characterized in that: The pressure seat (403) includes an outer sealing ring (4031) arranged on the outside of the inner sealing ring (4022), and two lower sealing rings (4032) are arranged below the upper cover (2). The two lower sealing rings (4032) are arranged at intervals, and the feed pipe (101) and the external connecting pipe (4016) are arranged in the gap between the lower sealing rings (4032).

6. The ternary precursor system preparation solution filtering device according to claim 1, characterized in that: The inner fixing member (501) comprises a limiting seat (5011) arranged on the inner edge of the net basket (3), and a long groove flush with the vertical section of the filter bag is formed on the inner side of the limiting seat (5011).

7. The ternary precursor system preparation solution filtering device according to claim 6, characterized in that: The limiting seat (5011) comprises a fixing strip (50111) located at the inner edge of the net basket (3), and an elastic pad (50112) is provided on both sides of the fixing strip (50111), and the two elastic pads (50112) are clamped on the outer peripheral surface of the matching rod (601).

8. The ternary precursor system preparation solution filtering device according to claim 1, characterized in that: The tensioning member (503) comprises a guide ring (5031) fixedly connected to the outer bottom of the net basket (3), and the bottom of the matching plate (502) is connected to a telescopic motor (5032), and the telescopic motor (5032) is fixedly connected to the bottom of the inside of the filtering kettle body (1).

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